Retrievable pump and anchor apparatus



Nov. 1, 1966 R. o. PARK RETRIEVABLE PUMP AND ANCHOR APPARATUS 4Sheets-Sheet l A; 26.

INVENTOR. Bosser 0- P01? 107'7'0QNE)$.

Filed July 5, 1965 Nov. 1, 1966 R o. PARK RETRIEVABLE PUMP AND ANCHORAPPARATUS 5 K Y 5 w m R w 2 Op 2 t p 0 e 7 N r e 5 w T M E mo M p S t 7E e 4 w a 0 w W Rm 3 l y m d l e H F Nov. 1, 1966 R. 0. PARK RETRIEVABLEPUMP AND ANCHOR APPARATUS 4 Sheets-Sheet 5 Filed July 5, 1963 INVENTOR.E0552? 0, PQRK 10 T roQn/E Y5.

Nov.

Filed July 5 1963 R. O. PARK RETRIEVABLE PUMP AND ANCHOR APPARATUS 4Sheets-Sheet 4 ITIHHH INVENTOR. B08527 0. Page 47 roe/vans.

United States Patent fornia Filed July 5, 1963, Ser. No. 292,926 16Claims. (Cl. 166-106) The present invention relates to subsurface wellbore apparatus, and more particularly to apparatus capable of beinganchored in a tubular string in a Well bore in connection with pumpingof the well, and for enabling other desirable purposes in the well boreto be performed.

An object of the invention is to provide pumping apparatus adapted to beanchored in a tubular string disposed in a well bore, the pump beingdetachable from the anchor portion of the apparatus for removal from thetubular string so as to allow the anchor portion of the apparatus toremain anchored in the tubular string, such anchor portion also beingretrievable from the tubular string, if desired.

Another object of the invention is to provide pumping apparatus adaptedto be anchored in a tubular string disposed in a well bore againstmovement therewithin, in which the sucker rods, pump, and pump seatingshoe, constituting the apparatus, can be run in the tubular string atthe same time and placed in operating position there- Within, therebyeliminating the necessity for making separate trips of equipment in thetubular string.

A further object of the invention to provide pumping apparatus adaptedto be run in a tubular string on sucker rods and readily set therein byappropriate manipulation of such sucker rods.

An additional object of the invention is to provide pumping apparatus,including sucker rods, a pump, and retrievable pump seating shoe,adapted to be run as a unit in a tubular string and anchored thereinthrough manipulation of the sucker rods, the shoe being readily releasedfrom the tubular string and shifted to a new location therein, orretrived from the well bore, at the will of the operator.

Yet another object of the invention is to provide a retrievable pumpseating shoe adapted to be run and anchored in a tubular string disposedin a well bore, in which the shoe can remain anchored until its releasefrom the tubular string is desired, which can be effected in a simplemanner by the mere taking of an upwardly directed pull on the shoe.

Still a further object of the invention is to provide an improved anchoror packer adapted to be anchored in a tubular string, which will remainin its anchored condi tion against both up and down movement, and whichis readily releasable from the tubular string, or retrievable therefrom,or both, by the taking ofan upward pull there- This invention possessesmany other advantages, and has other objects which may be made moreclearly apparent from a consideration of several forms in which it maybe embodied. Such forms are shown in the drawings accompanying andforming part of the present specification. These forms will now bedescribed in detail for the purpose of illustrating the generalprinciples of the invention; but it is to be understood that suchdetailed description is not to be taken in a limiting sense, since thescope of the invention is best defined by the appended claims.

Referring to the drawings:

FIGURE 1 is a side elevational view and longitudinal section through anapparatus disposed in a tubular string, the apparatus being in areleased condition;

FIGS. 2a and 2b constitute a combined longitudinal section and sideelevational view of the apparatus disclosed ice in FIG. 1, on anenlarged scale, FIG. 2b being a lower continuation of FIG. 2a;

FIGS. 3a and 3b are views corresponding to FIGS. 2a and 2b, with theapparatus in its set condition in the tubular string, FIG. 3b being alower continuation of FIG. 3a;

FIG. 4 is a side elevational view of a lock portion of the apparatuswhen parts of the apparatus are in the condition illustrated in'FIGS. 2aand 2b;

FIG. 5 is a view similar to FIG. 4 of the lock portion of the apparatuswhen the parts are in' the condition illustrated in FIGS. 3a and 3b;

FIG. 6 is a cross-section taken along the line 6-6 on FIG. 2b;

FIG. 7 is a cross-section taken along the line 77 on FIG. 2b;

FIG. 8 is a cross-section taken along the line 8-8 on FIG. 2b;

FIGS. 9a and 9b constitute a side elevational view and longitudinalsection through the apparatus conditioned for elevation in the tubularstring, FIG. 9b being a lower continuation of FIG. 9a;

FIG. 10 is a longitudinal section through a modified form of the upperportion of the apparatus shown in FIGS. 1 to 8, inclusive;

FIGS. 11a and 11b constitute a side elevational view and longitudinalsection through a modified form of apparatus anchored in the tubularstring, FIG. 11b being a lower continuation of FIG. 11a.

In the form of apparatus illustrated in FIGS. 1 to 9b, an anchor packerA is disclosed that embodies a pump seating shoe 10 which is to beplaced in an appropriate position in a tubular string B, such as astring of production tubing, installed in a well bore. A pump C is releasably secured to the seating shoe 10, which is actuated by a suitablestring of sucker rods D extending to the top of the well bore, thesucker rods being reciprocated by any suitable type of mechanism at thetop of the well bore, in a known manner.

The anchor apparatus A can be constituted as a well packer, including atubular body 11 having the upper seating shoe portion 10 threadedlysecured thereto, which is adapted to receive the seating mandrel or holddown part 12 of the pump C. The seating mandrel has a central passage 13therethrough and carries a plurality of pliant, elastic rings 14 whichwill frictionally engage the inner cylindrical wall 15 of the seatingshoe. Threadedly secured to the seating shoe is the inner stationaryplunger 16 of the deep well pump that has a central passage 17therethrough communicating with the mandrel passage 13. This plunger hasan upper seat 18 adapted to be engaged by a downwardly seating ball 19of a standing v-alve portion of the pump. Surrounding the plunger andmaking a close fit therewith is a traveling barrel 20, the upper end ofwhich is secured to the string of sucker rods D extending through thetubing string B to the top of the well bore. The traveling barrel has anupper traveling valve 21 therein, including a valve seat 22 adapted tobe engaged by a downwardly seating ball 23.

The pump C is shown only diagrammatically in the drawings, since itsstructure and mode of operation are known. During upward movement of thesucker rods D and traveling barrel 20, the traveling valve 21 is closed,the well production being elevated in the tubular string B. Duringupward movement of the traveling valve 21 away from the standing valve18, 19, the fluid in the well bore can flow upwardly through the plunger16, elevating the ball 19 from the standing valve seat 18, the Wellproduction flowing past the ball 19 into the space 24 within thetraveling barrel between the traveling valve and standing valve. Upondownward movement of the sucker rods D and traveling barrel 20, thestanding valve o: 18, 19 closes, and the fluid in the traveling barrelabove the standing valve will elevate the traveling valve ball 23 forits seat 22, such fluid flowing through the upper ports 25 in thetraveling barrel into the tubing string B above the pump.

The tubular body 11 of the well packer A has a packing element 26, suchas a rubber or rubber-like sleeve member, mounted thereon, the upper endof the packing element engaging the lower end of the seating shoe 10 andits lower end engaging the upper end of an expander 27 having a lowerdownwardly tapering expander surface 28. Such surface is adapted toengage companion inner tapered surfaces 29 on the upper anchor portions36 of circumferentially spaced slip members 31 disposed around the bodyof the tool. These slip members are mounted within longitudinal slots orgrooves 32 in a slip sleeve 33 slidable on the body 11, the slip sleevebeing threadedly connected to a housing 34 and having a lock pin 35mounted thereon adapted to fit within a lock slot 36 formed in the body.The lock pin 35 is held in position in the housing by an encompassingretainer sleeve -37 mounted on the housing and suitably secured thereto,as by means of a screw 38. The housing may also have a plurality ofoutwardly bowed drag springs 39 adapted to frictionally engage the wallof the tubing, the upper ends 40 of the drag springs being attached tothe housing by the retainer sleeve 37, which encompasses them. The lowerportions 41 of the drag springs may slide along the housing 34, or alongthe bases of longitudinal grooves 42 formed in the body, so that thedrag springs 39 can flex inwardly and outwardly.

The slip members 31 have lower drag portions 43 adapted to frictionallyengage -the wall of the tubing, such drag portions being urged outwardlyby helical compression springs 44 bearing against the bases of the slots32 and against the drag portions. The drag portions 43 extend throughwindows 45 formed in the slip sleeve 33, stop portions 46 of the sleevebeing disposed in intermediate grooves 47 in each slip member so as tohold the slip member assembled on the slip sleeve. The stop portions 46limit the extent of outward movement of the slip members 31 when theapparatus is removed from the tubing string B and also engage the slipmembers themselves to insure their joint longitudinal movement with theslip sleeve 33 in the tubing string. The lower ends 48 of the slipmembers are also engageable with the upper end of the retainer sleeve 37to limit the extent of outward movement of the drag portions 43 when thetool is out of the tubing string.

When the drag portions 43 fully engage the wall of the tubing string,the anchor portions 30 are disposed inwardly so that their teeth 49, 49ado not engage the tubing wall. Assuming the expander 27 to be shifteddownwardly behind the anchor portions 30, the latter are shiftedoutwardly, the slips rocking on the tubing wall about the upper ends oftheir drag portions 43, with the slip members below such fulcrum orrocking points 50 shifting inwardly against the force of the springs 44.The teeth 49, 49a are adapted to be embedded in the wall of the tubingto anchor the apparatus thereto. It is to be noted that the teeth 49 onsome (such as /2 of the slip members face in an upward direction andthat the teeth on the remainder of the slip members face in a downwarddirection, so as to anchor the apparatus to the tubing string againstmovement in both longitudinal directions when forced outwardly againstthe tubing string by the expander 27.

Downward movement of the expander 27 along the body 11 of the tool isprevented initially by engagement of an inner flange 51 on the expanderwith an outwardly directed flange 52- on the body. However, the body 11can move downwardly within the expander, as well as within the slipsleeve 33 and the housing 34. Initially, the packing element 26 andslips 31 are in their retracted positions, with the expander 27 disposedabove the slips,

4 the body 11 being prevented from shifting to any substantial distancewithin the parts therearound by the pin and slot lock device 35, 36. Asshown, the slot 36 has a short longitudinal leg portion 53 offset from along longitudinal leg portion 54, the upper end 55 of the long legportion terminating a substantial distance above the upper end 56 of theshort leg portion 53. The lower end of the long slot leg portion 54merges into a diagonal slot 57 that extends to the lower end of theshort leg slot portion.

The lock pin 35 is adapted to move relatively within all of the slotportions, being shiftable from a No. 1 position, shown in FIG. 4,engaging the upper end of the body forming the terminus of the shortslot leg 53, to a No. 2 position at the lower end of the short leg, thenproceeding relatively through the diagonal slot portion 57 to the No. 3position at the lower end of the long leg 54 and then relativelyupwardly to the No. 4 position at the upper end of the long leg. Whenthe pin 35 is in the No. 1 position, the body 11 is prevented frommoving downwardly with respect to the housing 34, slip structure, andexpander 27, so that the slips 31 and packing element 26 remain in theirretracted positions. Upon elevation of the body 11 within the housing34, the short leg 53 of the slot is moved upwardly so that the pin thenoccupies the No. 2 position, whereupon the body can be turned to theright and lowered gradually, so that the lock pin moves relativelythrough the diagonal slot 57 to the No. 3 position, whereupon the bodycan be lowered to shift the packing element 26 and expander 27downwardly toward the slips 31, the movement of which is resisted by thefrictional engagement of the drag portions 43 against the tubing stringB, supplemented by the friction force of the drag springs 39 against thetubing string. Upon such downward movement, the expander 27 is disposedwithin the anchor portions 30 of the slips, rocking the slips on thetubing wall to shift their anchor portions outwardly and embed theupward and downwardly facing teeth 49, 49a into the wall of the tubing.A continuation of the downward movement of the body 11 will then shiftthe seating shoe 10 toward the expander 27 to shorten the packingelement 26 and expand it outwardly into sealing engagement with the wallof the tubing string B.

The well packer or anohor A is adapted to be releasably locked in theanchored and packed-wolf condition just described by a releasable lockdevice acting between the housing 34- and the body 11. Such lockincludes a plurality of ratchet teeth 60 on a lower portion of the body,the upper and lower sides of which are both tape-red. These ratchetteeth are adapted to engage companion internal ratchet teeth 61 in asplit lock ring or sleeve 62 mounted within the lower portion of thehousing and having external cam teeth 63 engageable with companion 1internal cam teeth 64 formed in the housing. The coengaging tapered camteeth 63, 64 are tapered in an upward and inward direction so that anyrelative upward movement of the lock sleeve or ring 62 along the housing34 will urge the ring '62 inwardly. However, slight downward movement ofthe lock sleeve 62 with respect to the housing will permit the sleeve 62toexpand outwardly to increase its internal diameter. Thus, downwardmovement of the body ratchet teeth 60 within the lock sleeve 62 willallow the body to shift within the latter, the ratchet teeth 60, 61 thenmeshing with one another; whereupon, any tendency of the body 11 to moveupwardly will cause the body to carry the sleeve 62 upwardly and causethe cam teeth 63, 64 to coenigage and urge the sleeve inwardly tomaintain the ratchet teeth 60, 61 in engagement with each other.

Initially, the body ratchet teeth 60 are disposed above the body lockring 62, as disclosed in FIG. 211. However, when the slips 31 andpacking 26 have been fully expanded against the wall of the tubingstring B, the body ratchet teeth '60 are disposed within the body locksleeve 62 to prevent upward movement of the body 11 with respect to theparts that surround it (FIG. 3b).

The apparatus A can be retrieved from the tubing string B when desired.A tubular mandrel 70 is disposed within the body 11, this mandrel havingan adapter or head 71 at its upper end which normally rests upon theupper end of the body 11 and which has an internal thread 72 adapted toreceive the thread of a companion member, such as the threaded pin 73 atthe lower end of a string of sucker rods D (FIG. 9a). The inner mandrel70 has an intermediate portion 74 of an external diameter conforming tothe internal diameter of the body 11, which is disposed behind theratchet portion 60 of the body formed on flexible arms 75 provided bycircumferentially spaced longitudinal slots 76 ('FIG. 7) extendingthrough the body, so that the arms cannot flex inward-1y. However, themandrel 70 has a lower relieved portion 77 of a reduced externaldiameter, which can be placed behind the flexible arms 75 when acoupling or stop nut 78 at the lower end of the mandrel engages .thelower end 79 of the body, thereby removing the backing from behind theflexible arms. When the relieved portion 77 of the mandrel 70 isdisposed behind the flexible arms 75 and their ratchet portion 60, thetaking of sufficient upward strain on the mandrel 70 will cause the stopnut 78 to engage the lower end of the body 79 and shift the latterupwardly of the body lock sleeve or ring 62, the coengaging taperedratchet teeth 60, 61 causing the flexible arms 75 .to cam inwardly andeflfect disengagement of the body ratchet teeth 60 from the sleeveratchet teeth 61, the body 11 then moving upwardly within the parts thatsurround it to shift the seating shoe away from the expander 27,allowing the packing element 26 to retract inherently, after which thebody shoulder 52 engages the expander shoulder 51 and elevates thelatter from its position within and behind the anchor portions 30 of theslips, the springs 44 then rocking the drag portions 43 of the slipsoutwardly against the tubing string and the anchor portions 30 inwardlyfrom engagement with the wall of the tubing string. Elevation of themandrel 70 will now effect elevation of the packer A within the tubingstring B, allowing the apparatus to be moved to a new location in thetubing string, or removed entirely therefrom.

Upon elevation of the body 111 within the housing 34, the lock pin 35automatically moves down the long leg 54 of the slot and into thediagonal slot leg 57 back to the No. 2 position, whereupon lowering ofthe mandrel 70 will shift its enlarged backup portion 74 behind theratchet tooth arms 75 and engage the adapter head 71 with the upper endof the body 11, lowering of the body again relatively locating the lockpin 35 in the upper end 56 of the short leg 53 of the slot 36. Downwardmovement of the apparatus A in the tubing string B can now continue withthe slips 31 and packing element 26 remaining in their retractedpositions.

The apparatus A heretofore described can be associated with the pump Ctherea'bove in several manners. As disclosed in FIGS. 1 to 3b, theseating mandrel 12 attached to the pump plunger 16 is frictionally andfirmly held in the seating shoe 10. The upper end of the pump isconnected to the lower end of the solid string of sucker rods D and thecombination of apparatus lowered in the tubing string B to the locationat which the packer is to be set. When such location is reached, thesucker rods D are picked up a distance amounting to the stroke of thepump, or silightly in excess thereof, which will shift the body 11upwardly and relatively place the lock pin 35 in the No. 2 position. Thesucker rods D are then slacked off while they are turned to the right,which will relatively turn the body 11 and shift it downwardly withrespect to the housing 34 and slip structure, the lock pin 35 movingrelatively through the diagonal slot 57 to the No. 3 and the No. 4position, the downward movement effecting full setting of the slips 31and of the packing element 26 against the well casing, as well asshifting the ratchet portion 60 of the body down within the body locksleeve 62, as disclosed in FIGS. 3a, 3b. For the purpose of insuringthat the tool A is anchored in packed-off condition completely, thesucker rods D can be moved up and down several times to effect a jarringaction through the .pump C on the body 11 of the tool, or suflicientweight of the sucker rods may be available for setting down on the toolA through the pump C to firmly embed the upwardly and downwardly facingwickers or teeth 49, 49a of the slips 31 in the tubing wall, and toshorten and compress the packing element 26 in leakproof sealingengagement with the tubing wall.

The sucker rods D and the traveling barrel 20 of the pump can now bereciprocated to effect a pumping action in the well, the fluid flowingfrom the formation intothe tubing string 'B and upwardly through thetubular mandrel 70 and the seating mandrel or hold down %2 into the pumpC, being discharged from the pump in o the tubing B above the apparatusA.

In the event it is desired to retrieve the pump C, a sufficient strainis taken on the string of sucker rods D to pull the seating mandrel 12frictionally out of the seating shoe 10, the sucker rods D and pump Cthen being removed to the top of the well bore. A string of sucker rodsD, with the appropriate threaded connection 73 in its lower end, canthen be run into the tubing string B and the sucker rods threaded intothe mandrel adapter or head 71, whereupon an upward pull is taken on thesucker rods to shift the mandrel 70 upwardly to place its relievedportion 77 opposite the deflecta'ble arms 75 of the body and itscoupling nut 78 in engagement with the lower end 79 of the body 11. Thetaking of a suflicient upward strain on the sucker rods D, mandrel 70and body 11 will now cause the ratchet teeth 60 to be cammed inwardly ofthe lock sleeve ratchet teeth 61, since the arms 75 can deflect inwardlyas permitted by the relieved portion 77 of the mandrel, the body 11being shifted upwardly of the housing '34 and of the other parts thatsurround it for the purpose of allowing the packing element 26 toinherently return to its retracted position and to shift the expander 27upwardly out of the slips 31, whereupon the springs 44 will shift theanchor portions 30 inwardly from the tubing string (FIGS. 9a, 9b). Thepacker or anchor A can now be removed from the tubing string B, ifdesired, by elevating the sucker rods D.

The pump C can be connected directly to the mandrel 70, as by threadingthe seating mandrel 12 directly to the mandrel adapter head 71aillustrated in FIG. 10. If so connected, release of the packer or anchorA from the Well casing can occur without any need for first removing thepump C from the tubing string B. .It is only necessary to move thesucker rods D upwardly surficiently to pull the mandrel 70 upwardly tothe released position, in which the relieved portion 77 is locatedbehind the spring-like ratchet arms 75 of the body, the coupling nut 78engaging the lower end 79 of the body 11. With such arrangement, theapparatus can be relocked by placing the lock pin 35 in its No. 1position and the apparatus relocated at any desired point in the tubingstring, after which the sucker rods D and pump C can be moved downwardlyto shift the mandrel 70 downwardly within the body, the body 11 thenbeing manipulated to place the lock pin in its released position No. 3once again, for the purpose of then enabling the body to be shifteddownwardly with respect to the parts that surround it, and therebyreexpand the slips and packing against the tubing wall. After suchsetting has occurred, the pump C is operable in its normal fashion. Atany time thereafter, the apparatus A can be released from the tubingstring B by appropriate manipulation of the sucker rods D, pump C andmandrel 70, and shifted to still a different location, or its completeremoval from the tubing string effected.

In the form of apparatus illustrated in FIGS. 11a, 11b, the anchor A isdisclosed in combination with hollow sucker rods D through which thewell production is to be pumped. When hollow sucker rods are used, thepacking element 26 is not desired since it is only necessary to anchorthe pump plunger 16 to the tubing string. Under such conditions, thepacking 26 is replaced by a helical spring 26a which can be compressedto a final length corresponding generally to the final compressed lengthof the packing sleeve. This will insure that the ratchet tooth portion60 of the body will be disposed within the lock sleeve 62 after fullanchoring of the slips 31 against the wall of the tubing string.

As shown in FIGS. 11a, 11b, reciprocation of the traveling barrel 20will cause the well production to move upwardly through the plunger 16,past the standing valves 18, 19 and the traveling valve 21 into thehollow sucker rods D flowing upwardly therethrough to the top of thewell bore. Any gas entrained in the oil can rise to the top of the oilcolumn in the tubing string B externally of the string of sucker rods Dinasmuch as there is no packing element present precluding such upwardflow of gas. As a result, gas and oil separation is eifected.

The apparatus is illustrated in FIGS. 11a, 11b anchored in the tubingstring B. It is operable in the same manner as the other form of theapparatus with respect to its being run in the tubing string, beingreleased therefrom, shifted to a new location in the tubing string, orremoved completely therefrom.

It is, accordingly, apparent that a pump assembly has been providedcapable of anchoring a pump in the tubing string, and in which the pumpcan be released and pulled from the tubing string whenever desired, asfor replacing valve parts, and the like, without the necessity forreleasing and removing the anchor A itself. After replacement of thepump starts, it can be run in the tubing string and its seating mandrel12 again forced into the seating shoe of the apparatus, in order toanchor the plunger 16 against movement in the tubing string. If it werenecessary to remove the anchor apparatus A itself each time the pumpneeded repair or replacement of parts, difl'iculties might beencountered in view of restrictions in the tubing string resulting fromthe accumulation of paraffin or scale on the tubing wall. Despite thefact that the anchor or packer A remains in the tubing string, it isreadily releasable therefrom whenever desired, and can be resettherewithin.

I claim:

1. In apparatus adapted to be disposed in a tubular string within a wellbore: a pump operable by sucker rods; a body to which said pump isreleasably secured and from which said pump can be released while saidbody and pump are in the well bore; normally retracted means on saidbody; means responsive to manipulation of said body by the sucker rodsand pump for expanding said normally retracted means against the tubularstring; means for releasably locking said normally retracted means insaid expanded condition against the tubular string; and holding meanspreventing release of said lock ing means when in one position andmovable with respect to said body to another position permitting suchrelease.

2. In apparatus adapted to be disposed in a tubular string within a wellbore: a pump operable by sucker rods; a body to which said pump isreleasably secured and from which said pump can be released while saidbody and pump are in the well bore; normally retracted anchoring meanson said body; means responsive to manipulation of said body by thesucker rods and pump for expanding said anchoring means against thetubular string to anchor said body thereto; means initially preventingoutward expansion of said anchoring means and releasable in response tomanipulation of said body by the sucker rods and pump to permit suchexpansion; means for releasably locking said anchoring means in saidexpanded condition against the tubular string; and holding meanspreventing release of said locking means when in one position andmovable with respect to said body to another position permitting such arelease.

' 3. In apparatus adapted to be disposed in a tubular string within awell bore: a pump operable by sucker rods; 21 body to which said pump isreleasably secured and from which said pump can he released while saidbody and pump are in the well bore; normally retracted anchoring meanson said body; normally retracted packing means on said body; meansresponsive to manipulation of said body by the sucker rods and pump forexpanding said anchoring means and packing means against the tubularstring to anchor said body in leakproof relation thereto; means forreleasably locking said anchoring means and packing means in saidexpanded condition against the tubular string; and holding meanspreventing release of said locking means when in one position andmovable with respect to said body to another position permitting suchrelease.

4. In apparatus adapted to be disposed in a tubular string within a wellbore: a pump operable by sucker rods; a body to which said pump isreleasably secured; normally retracted means on said body; meansresponsive to manipulation of said body by the sucker rods and pump forexpanding said normally retracted means against the tubular string;coengageable means operatively connected to said body and normallyretracted means for releasably locking said normally retracted means insaid expanded condition against the tubular string, said locking meansincluding instrumentalities on said body movable inwardly from lockingrelation to instrumentalities operatively connected to said normallyretracted means; and holding means in said body preventing inwardmovement of said body instrumentalities when said holding means is inone position in said body, said holding means being movable to anotherposition in said body permitting inward movement of said bodyinstrumentalities.

5. In apparatus adapted to be disposed in a tubular string within a wellbore: a pump operable by sucker rods; a body to which said pump isreleasably secured; normally retracted anchoring means on said body;means responsive to manipulation of said body by the sucker rods andpump for expanding said anchoring means against the tubular string toanchor said body thereto; means initially preventing outward expansionof said anchoring means and releasable in response to manipulation ofsaid body by the sucker rods and pump to permit such expansion,coengageable means operatively connected to said body and anchoringmeans for releasably locking said anchoring means in said expandedcondition against the tubular string, said locking means includinginstrumentalities on said body movable inwardly from locking relation toinstrumentalities operatively connected to said anchoring means; andholding means in said body preventing inward movement of said bodyinstrumentalities when said holding means is in one position in saidbody, said holding means being movable to another position in said bodypermitting inward movement of said body instrumentalities.

6'. In apparatus adapted to be disposed in a tubular string within awell bore: a pump operable by sucker rods; a body to which said pump isreleasably secured; normally retracted anchoring means on said body;normally retracted packing means on said body; means responsive tomanipulation of said body by the sucker rods and pump for expanding saidanchoring means and packng means against the tubular string to anchorsaid body in leakpr-oof relation thereto; means initially preventingoutward expansion of said anchoring means and packing means andreleasable in response to manipulation of said body by the sucker rodsand pump to permit their expansron; coengageable means operativelyconnected to said body and anchoring means for releasably locking saidanchoring means and packing means in said expanded condition against thetubular string, said locking means including instrumentalities on saidbody movable inwardly from locking relation to instrumentalitiesoperatively cOnnected to said anchoring means: and holding means in saidbody preventing inward movement of said body instrumentalities when saidholding means is in one position on said body, said holding means beingmovable to another position in said body permitting inward movement ofsaid body instrumentalities.

7. In apparatus adapted to be disposed in a tubular string within a wellbore: a pump operable by sucker rods; a body to which said pump isreleasably secured; normally retracted means on said body; meansresponsive to manipulation of said body by the sucker rods and pump forexpanding said normally retracted means against the tubular string; saidbody having laterally deflectable arms and ratchet teeth on said arms;means operatively connected to said normally retracted means and havingoompanion ratchet teeth engageable by said arm teeth to releasably locksaid normally retracted means in said expanded condition against thetubular string; and holding means in said body behind said armspreventing inward deflection of said arms to prevent disengagementbetween said teeth, said holding means having a relieved portion adaptedto be located behind said arms upon movement of said holding means insaid body to permit inward defiecti-on of said arms and release of saidarm teeth from said other teeth.

8. In apparatus adapted to be disposed in a tubular string within a wellbore: a pump operable by sucker rods; a body to which said pump isreleasably secured; normally retracted packing means on said body; anexpander on said body engageable with the lower end portion of saidpacking means; slip means on said body below said expander; drag meansfior resisting movement of said slip means in said tubular string;coengageable means on said body and slip means initially preventingrelative longitudinal movement between said body and slip means, andreleasable in response to manipulation of said body by the sucker rodsand pump to permit downward movement of said body to shift said expanderbehind said slips to expand said slips against the tubular string and toexpand said packing element against the tubular string; coengageablelocking means on said body and slip means for preventing relativemovement therebetween to retain said packing means and slip means inexpanded condition against said tubular string, said locking meansincluding instrumentalities on said body movable inwardly from lockingrelation to inst-rumentalities on said slip means; a tubular mandrel insaid body behind said body instrumentalities to prevent inward movementthereof when said mandrel is in one position in said body, said mandrelhaving a relieved portion adapted to be located behind said bodyinstrumentalities upon upward movement of said mandrel in said body topermit inward movement of said body instrumentalities and their releasefrom said other instrumentalities.

9. In apparatus adapted to be disposed in a tubular string within a wellbore: a pump operable by sucker rods, a body to which said pump isreleasably secured; an expander on said body; slip means on said bodybelow said expander; drag means for resisting movement of said slipmeans in said tubular string; co-engageable means on said body and slipmeans initially preventing relative longitudinal movement between saidbody and slip means, and releasable in response to manipulation of saidbody by the sucker :rods and pump to permit downward movement of saidbody to shift said expander behind said slip means to expand said slipmeans against the tubular string; coengageable locking means on saidbody and slip means for preventing relative movement therebetwcen toretain said slip means in expanded condition against said tubularstring, said locking means including instrumentalities on said bodymovable inwardly from locking relation to instrumentalities on said slipmeans; a tubular mandrel in said body behind said body instrumentalitiesto prevent inward movement thereof when said mandrel is in one positionin said body, said mandrel having a relieved portion adapted to belocated behind said body instrumentalities upon upward movement of saidmandrel in said body to permit inward movement of said bodyinstrumentalities and their release from said other instrumentalities.

10. In apparatus adapted to be disposed in a tubular string within awell bore: a body; normally retracted means on said body; meansresponsive to manipulation of said body for expanding said normallyretracted means against the tubular string; means for releasably lockingsaid normally retracted means in said expanded condition against saidtubular string; and holding means preventing release of said lockingmeans when in one position and movable with respect to said body toanother position permitting such release.

11. In apparatus adapted to be disposed in a tubular string within awell bore: a body; normally retracted anchoring means on said body;means initially preventing outward expansion of said anchoring means andreleasable in response to manipulation of said body; means responsive tomanipulation of said body for expanding said anchoring means against thetubular string to anchor said body thereto; means for releasably lockingsaid anchoring means in said expanded condition against the tubularstring; and holding means preventing release of said locking means whenin one position and movable with respect to said body to anotherposition permitting such release.

12. In apparatus to be disposed in a tubular string within a well bore:a body; normally retracted means on said body; means responsive tomanipulation of said body for expanding said normally retracted meansagainst the tubular string; coengageable means on said body and normallyretracted means for releasably locking said norm ally retracted means insaid expanded condition against the tubular string, said locking meansincluding instrumentalities on said body movable inwardly from lockingrelation to instrumentalities on said normally retracted means; holdingmeans in said body preventing inward movement of said bodyinstrumentalities when said holding means is in one position in saidbody, said holding means being movable to another position in said bodypermitting inward movement of said body instrumentalities.

13. In apparatus to be disposed in a tubular string within a well bore:a body; normally retracted means on said body; means responsive tomanipulation of said body for expanding said normally retracted meansagainst the tubular string; said body having laterally deflectable armsand ratchet teeth on said arms; said normally retracted means havingcompanion ratchet teeth engageable by said arm teeth to releasably locksaid normally retracted means in said expanded condition against thetubular string; and holding means in said body behind said armspreventing inward deflection of said arms to prevent disengagementbetween said teeth, said holding means having a relieved portion adaptedto be located behind said arms upon movement of said holding means insaid body to permit inward deflection of said arms and release of saidarm teeth from said other teeth.

14. In apparatus to be disposed in a tubular string within a well bore:a body; norm-ally retracted anchoring means on said body; meansinitially preventing outward expansion of said anchoring means andreleasable in response to manipulation of said body to permit suchexpansion; means responsive to manipulation of said body for expandingsaid anchoring means against the tubular string; said body havinglaterally deflectable arms and ratchet teeth on said arms; saidanchoring means having companion ratchet teeth engageable by said armteeth to releasably lock said anchoring means in said expanded condition:against the tubular string; and holding means in said body behind saidarms preventing inward deflection of said arms to prevent disengagementbetween said teeth, said holding means having a relieved portion adaptedto be located behind said arms upon movement of said holding means insaid body to permit I ll inward deflection of said arms and release ofsaid arm teeth from said other teeth.

15. In apparatus :adapted to be disposed in a tubular string within awell bore: a body; normally retracted packing means on said body; anexpander on said body engageable with the lower portion of said packingmeans; slip means on said body below said expander; drag meansfrictionally engageable with the tubular string to resist movement ofsaid slip means therewithin; releasable lock means on said body and slipmeans initially preventing substantial longitudinal movementtherebetween and releasable by said body to permit downward movement ofsaid body within said slip means to shift said expander behind said slipmeans and expand said slip means out- Wardly against the tubular stringand to expand said packing means :against the tubular string; said bodyhaving laterally deflectable arms and ratchet teeth on said arms; saidslip means having companion ratchet teeth engageable by said arm teethto releasably lock said slip means to said body with said slip means andpacking means in their expanded conditions against the tubular string;and a tubular mandrel in said body behind said arms prevent-ing inwarddeflection of said arms to prevent disengagement between said teeth,said mandrel having a relieved portion adapted to be located behind saidarms upon upward movement of said mandrel in said body to permit inW-arddeflection of said arms and release of said arm teeth from said otherteeth.

16. In apparatus adapted to be disposed in a tubular string within awell bore: a body; an expander on said body; slip means on said bodybelow said expander; drag means frictionally en-gagea-ble with thetubular string to resist movement of said slip means therewithin;releasable lock means on said body and slip means initially preventingsubstantial longitudinal movement therebetween and releasable by saidbody to permit downward movement of said body within said slip means toshift said expander behind said slip means and expand said slip meansoutwardly against the tubular string; said body having laterallydeflectable arms and ratchet teeth on said arms; said slip means havingcompanion ratchet teeth engageable by said a-rm teeth to releasably locksaid slip means to said body with said slip means in their expandedcondition against the tubular string; and a tubular mandrel in said bodybehind said arms preventing inward deflection of said arms to preventdisengagement between said teeth, said mandrel having a relieved portionadapted to be located behind said arms upon upward movement of saidmandrel in said body to permit inward deflection of said arms andrelease of said arm teeth from said other teeth.

References Cited by the Examiner UNITED STATES PATENTS 2,604,945 7/1952Page 103219 X 3,020,959 2/1962 Nutter 166134 3,195,643 7/1965 Harbisonet al 166-138 CHARLES E. OCONNEL, Primary Examiner.

BENJAMIN HERSH, Examiner.

J. A. LEPPINK, Assistant Examiner.

1. IN APPARATUS ADAPTED TO BE DISPOSED IN A TUBULAR STRING WITHIN A WELLBORE; A PUMP OPERABLE BY SUCKER RODS; A BODY TO WHICH SAID PUMP ISRELEASABLY SECURED AND FROM WHICH SAID PUMP CAN BE RELEASED WHILE SAIDBODY AND PUMP ARE IN THE WELL BORE; NORMALLY RETRACTED MEANS ON SAIDBODY; MEANS RESPONSIVE TO MANIPULATION OF SAID BODY BY THE SUCKER RODSAND PUMP FOR EXPANDING SAID NORMALLY RETRACTED MEANS AGAINST THE TUBULARSTRING MEANS FOR RELEASABLY LOCKING SAID NORMALLY RETRACTED MEANS INSAID EXPANDED CONDITION AGAINST THE TUBULAR STRING; AND HOLDING MEANSPREVENTING RELEASE OF SAID LOCKING MEANS WHEN IN ONE POSITION ANDMOVABLE WITH RESPECT TO SAID BODY TO ANOTHER POSITION PERMITTING SUCHRELEASE.